Question

Decimal digit in BCD can be represented by ____________

(a) 1 input line

(b) 2 input lines

(c) 3 input lines

(d) 4 input lines

I have been asked this question in examination.

The doubt is from BCD Adder in chapter Arithmetic Circuits of Digital Circuits

Answer 1

Right option is (d) 4 input lines

Explanation: Binary-coded decimal (BCD) is a class of binary encodings of decimal numbers where each decimal digit is represented by a fixed number of bits, usually four or eight. Decimal digit in BCD can be represented by 4 input lines. Since it is constructed with 4-bits.